Functions and Modular Programming

Function Definition Syntax

Alternative Function Syntax

Function Naming Conventions

Function Documentation

Calling Functions

Function Arguments

Return Values and Exit Status

Positional Parameters in Functions

Parameter Shifting

Default Parameter Values

Variable Number of Arguments

Global Variables

Local Variables

Variable Shadowing

Best Practices for Scope

Exit Status Returns

Output Capture

Global Variable Modification

Complex Return Data

Recursive Functions

Function Libraries

Dynamic Function Creation

Function Overriding

Sourcing External Scripts

Creating Function Libraries

Modular Script Design

Code Reusability